Remove unnecessary win32 libs.

It seems that those libraries are not needed (anymore ?).
Even more, `msvcr100` makes `kiwix-serve` crash when printing messages
on stdout/stderr.

`msvcr100` lib is necessary for ICU, because the default mingw's `msvcr`
doesn't provide `_free_locale` and `_create_locale`.

Most recent versions of mingw fix this and we do not need them.
On debian (travis CI) we use a old version of mingw and we need to force
the use of `msvcr100`.

kiwixbuild/platforms/win32.py

@@ -6,10 +6,10 @@ from kiwixbuild._global import neutralEnv
 
 
 class Win32PlatformInfo(PlatformInfo):
-    extra_libs = ['-lwinmm', '-lws2_32', '-lshlwapi', '-lrpcrt4', '-lmsvcr100', '-liphlpapi']
     build = 'win32'
     compatible_hosts = ['fedora', 'debian']
     arch_full = 'i686-w64-mingw32'
+    extra_libs = ['-lwinmm', '-lshlwapi', '-lws2_32']
 
     def get_cross_config(self):
         return {