Revert "[libc][math] Refactor exp implementation to header-only in src/__support/math folder." (#148668)

Reverts #148091
Full build bots are failing.

Author: lntue

libc/shared/math.h

@@ -11,7 +11,6 @@
 
 #include "libc_common.h"
 
-#include "math/exp.h"
 #include "math/expf.h"
 #include "math/expf16.h"
 #include "math/frexpf.h"

libc/shared/math/exp.h

@@ -110,42 +110,3 @@ add_header_library(
   DEPENDS
     libc.src.__support.FPUtil.manipulation_functions
 )
-
-add_header_library(
-  exp_constants
-  HDRS
-    exp_constants.h
-  DEPENDS
-    libc.src.__support.FPUtil.triple_double
-)
-
-add_header_library(
-  exp_utils
-  HDRS
-    exp_utils.h
-  DEPENDS
-    libc.src.__support.CPP.optional
-    libc.src.__support.CPP.bit
-    libc.src.__support.FPUtil.fp_bits
-)
-
-add_header_library(
-  exp
-  HDRS
-    exp.h
-  DEPENDS
-    .exp_constants
-    .exp_utils
-    libc.src.__support.CPP.bit
-    libc.src.__support.CPP.optional
-    libc.src.__support.FPUtil.dyadic_float
-    libc.src.__support.FPUtil.fenv_impl
-    libc.src.__support.FPUtil.fp_bits
-    libc.src.__support.FPUtil.multiply_add
-    libc.src.__support.FPUtil.nearest_integer
-    libc.src.__support.FPUtil.polyeval
-    libc.src.__support.FPUtil.rounding_mode
-    libc.src.__support.FPUtil.triple_double
-    libc.src.__support.integer_literals
-    libc.src.__support.macros.optimization
-)