deps: remove pthread-fixes.c from uv.gyp

The file was removed in the latest libuv upgrade. Remove it from the
build recipe as well.

Fixes: #49739
PR-URL: #49744
Reviewed-By: Darshan Sen <raisinten@gmail.com>
Reviewed-By: Debadree Chatterjee <debadree333@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Santiago Gimeno <santiago.gimeno@gmail.com>

Author: bnoordhuis

deps/uv/uv.gyp

@@ -136,7 +136,6 @@
     'uv_sources_android': [
       'src/unix/linux.c',
       'src/unix/procfs-exepath.c',
-      'src/unix/pthread-fixes.c',
       'src/unix/random-getentropy.c',
       'src/unix/random-getrandom.c',
       'src/unix/random-sysctl-linux.c',
@@ -398,7 +397,6 @@
         }],
         ['OS=="zos"', {
           'sources': [
-            'src/unix/pthread-fixes.c',
             'src/unix/os390.c',
             'src/unix/os390-syscalls.c'
           ]