MSVC: Always enable common tests 137 and 170

This will test the "whole archive" and "generator link whole" for all
Visual C++ versions.

test cases/common/137 whole archive/meson.build

@@ -6,14 +6,6 @@ endif
 
 add_project_arguments('-I' + meson.source_root(), language : 'c')
 
-cc = meson.get_compiler('c')
-
-if cc.get_id() == 'msvc'
-  if cc.version().version_compare('<19')
-    error('MESON_SKIP_TEST link_whole only works on VS2015 or newer.')
-  endif
-endif
-
 # Test 1: link_whole keeps all symbols
 # Make static func1
 subdir('st_func1')

test cases/common/170 generator link whole/meson.build

@@ -4,13 +4,6 @@ if meson.backend() == 'xcode'
     error('MESON_SKIP_TEST: whole-archive not supported in Xcode. Patches welcome.')
 endif
 
-cc = meson.get_compiler('c')
-if cc.get_id() == 'msvc'
-  if cc.version().version_compare('<19')
-    error('MESON_SKIP_TEST link_whole only works on VS2015 or newer.')
-  endif
-endif
-
 # This just generates foo.h and foo.c with int foo() defined.
 gen_py = find_program('generator.py')
 gen = generator(gen_py,