[libc] Remove trivial .h.def files (#149466)

Remove all the .h.def files that already express nothing
whatsoever not already expressed in YAML.  Clean up a few YAML
files without materially changing any generated header output.

Many more .h.def files remain that need a bit of conversion in
YAML to express macro requirements and such.

Author: frobtech

libc/include/dirent.h.def

@@ -1,47 +1,45 @@
 header: dirent.h
-header_template: dirent.h.def
-macros: []
+standards:
+  - posix
 types:
   - type_name: struct_dirent
   - type_name: DIR
   - type_name: ino_t
-enums: []
-objects: []
 functions:
   - name: alphasort
     standards:
-      - POSIX
+      - posix
     return_type: int
     arguments:
       - type: const struct dirent **
       - type: const struct dirent **
   - name: closedir
     standards:
-      - POSIX
+      - posix
     return_type: int
     arguments:
       - type: DIR *
   - name: dirfd
     standards:
-      - POSIX
+      - posix
     return_type: int
     arguments:
       - type: DIR *
   - name: fdopendir
     standards:
-      - POSIX
+      - posix
     return_type: DIR *
     arguments:
       - type: int
   - name: opendir
     standards:
-      - POSIX
+      - posix
     return_type: DIR *
     arguments:
       - type: const char *
   - name: readdir
     standards:
-      - POSIX
+      - posix
     return_type: struct dirent *
     arguments:
       - type: DIR *

libc/include/dirent.yaml

@@ -1,6 +1,6 @@
 header: search.h
-header_template: search.h.def
-macros: []
+standards:
+  - posix
 types:
   - type_name: ACTION
   - type_name: ENTRY
@@ -12,35 +12,35 @@ objects: []
 functions:
   - name: hcreate
     standards:
-      - POSIX
+      - posix
     return_type: int
     arguments:
       - type: size_t
   - name: hcreate_r
-    standards: GNUExtensions
+    standards: gnu
     return_type: int
     arguments:
       - type: size_t
       - type: struct hsearch_data *
   - name: hdestroy
-    standards: GNUExtensions
+    standards: gnu
     return_type: void
     arguments: []
   - name: hdestroy_r
     standards:
-      - POSIX
+      - posix
     return_type: void
     arguments:
       - type: struct hsearch_data *
   - name: hsearch
     standards:
-      - POSIX
+      - posix
     return_type: ENTRY *
     arguments:
       - type: ENTRY
       - type: ACTION
   - name: hsearch_r
-    standards: GNUExtensions
+    standards: gnu
     return_type: int
     arguments:
       - type: ENTRY
@@ -49,20 +49,20 @@ functions:
       - type: struct hsearch_data *
   - name: insque
     standards:
-      - POSIX
+      - posix
     return_type: void
     arguments:
       - type: void *
       - type: void *
   - name: remque
     standards:
-      - POSIX
+      - posix
     return_type: void
     arguments:
       - type: void *
   - name: lfind
     standards:
-      - POSIX
+      - posix
     return_type: void *
     arguments:
       - type: const void *
@@ -72,7 +72,7 @@ functions:
       - type: __search_compare_t
   - name: lsearch
     standards:
-      - POSIX
+      - posix
     return_type: void *
     arguments:
       - type: const void *

libc/include/search.h.def

@@ -1,10 +1,8 @@
 header: setjmp.h
-header_template: setjmp.h.def
-macros: []
+standards:
+  - stdc
 types:
   - type_name: jmp_buf
-enums: []
-objects: []
 functions:
   - name: longjmp
     standards:
@@ -23,7 +21,7 @@ functions:
       - type: jmp_buf
   - name: sigsetjmp
     standards:
-      - POSIX
+      - posix
     return_type: int
     attributes:
       - _Returns_twice
@@ -32,7 +30,7 @@ functions:
       - type: int
   - name: siglongjmp
     standards:
-      - POSIX
+      - posix
     return_type: _Noreturn void
     arguments:
       - type: sigjmp_buf

libc/include/search.yaml

@@ -1,17 +1,15 @@
 header: spawn.h
-header_template: spawn.h.def
-macros: []
+standards:
+  - posix
 types:
   - type_name: posix_spawn_file_actions_t
   - type_name: posix_spawnattr_t
   - type_name: pid_t
   - type_name: mode_t
-enums: []
-objects: []
 functions:
   - name: posix_spawn
     standards:
-      - POSIX
+      - posix
     return_type: int
     arguments:
       - type: pid_t *__restrict
@@ -22,22 +20,22 @@ functions:
       - type: char * const * __restrict
   - name: posix_spawn_file_actions_addclose
     standards:
-      - POSIX
+      - posix
     return_type: int
     arguments:
       - type: posix_spawn_file_actions_t *
       - type: int
   - name: posix_spawn_file_actions_adddup2
     standards:
-      - POSIX
+      - posix
     return_type: int
     arguments:
       - type: posix_spawn_file_actions_t *
       - type: int
       - type: int
   - name: posix_spawn_file_actions_addopen
     standards:
-      - POSIX
+      - posix
     return_type: int
     arguments:
       - type: posix_spawn_file_actions_t *__restrict
@@ -47,13 +45,13 @@ functions:
       - type: mode_t
   - name: posix_spawn_file_actions_destroy
     standards:
-      - POSIX
+      - posix
     return_type: int
     arguments:
       - type: posix_spawn_file_actions_t *
   - name: posix_spawn_file_actions_init
     standards:
-      - POSIX
+      - posix
     return_type: int
     arguments:
       - type: posix_spawn_file_actions_t *

libc/include/setjmp.h.def

@@ -1,5 +1,6 @@
 header: string.h
-header_template: string.h.def
+standards:
+  - stdc
 macros:
   - macro_name: NULL
     macro_header: null-macro.h
@@ -11,7 +12,7 @@ objects: []
 functions:
   - name: memccpy
     standards:
-      - POSIX
+      - posix
     return_type: void *
     arguments:
       - type: void *__restrict
@@ -61,7 +62,7 @@ functions:
       - type: size_t
   - name: mempcpy
     standards:
-      - POSIX
+      - posix
     return_type: void *
     arguments:
       - type: void *__restrict
@@ -93,14 +94,14 @@ functions:
       - type: size_t
   - name: stpcpy
     standards:
-      - POSIX
+      - posix
     return_type: char *
     arguments:
       - type: char *__restrict
       - type: const char *__restrict
   - name: stpncpy
     standards:
-      - POSIX
+      - posix
     return_type: char *
     arguments:
       - type: char *__restrict
@@ -243,7 +244,7 @@ functions:
       - type: size_t
   - name: strnlen
     standards:
-      - POSIX
+      - posix
     return_type: size_t
     arguments:
       - type: const char *
@@ -271,7 +272,7 @@ functions:
       - type: const char *__restrict
   - name: strsignal
     standards:
-      - POSIX
+      - posix
     return_type: char *
     arguments:
       - type: int
@@ -298,7 +299,7 @@ functions:
       - type: const char *__restrict
   - name: strtok_r
     standards:
-      - POSIX
+      - posix
     return_type: char *
     arguments:
       - type: char *__restrict