feat: remove Math library source, header, tests, and build references from MSVC projects

Remove the entire wren_math.c and wren_math.h implementation files, delete all math test scripts under test/math/, and strip the WREN_USE_LIB_MATH compile flag from wren_common.h. Also remove the wrenLoadMathLibrary call from wren_vm.c and delete the wren_math.c/h entries from both the MSVC project file and its filters file.

project/msvc2013/wren/wren.vcxproj

@@ -83,7 +83,6 @@
     <ClCompile Include="..\..\..\src\wren_core.c" />
     <ClCompile Include="..\..\..\src\wren_debug.c" />
     <ClCompile Include="..\..\..\src\wren_io.c" />
-    <ClCompile Include="..\..\..\src\wren_math.c" />
     <ClCompile Include="..\..\..\src\wren_utils.c" />
     <ClCompile Include="..\..\..\src\wren_value.c" />
     <ClCompile Include="..\..\..\src\wren_vm.c" />
@@ -95,7 +94,6 @@
     <ClInclude Include="..\..\..\src\wren_core.h" />
     <ClInclude Include="..\..\..\src\wren_debug.h" />
     <ClInclude Include="..\..\..\src\wren_io.h" />
-    <ClInclude Include="..\..\..\src\wren_math.h" />
     <ClInclude Include="..\..\..\src\wren_utils.h" />
     <ClInclude Include="..\..\..\src\wren_value.h" />
     <ClInclude Include="..\..\..\src\wren_vm.h" />

project/msvc2013/wren/wren.vcxproj.filters

@@ -39,9 +39,6 @@
     <ClCompile Include="..\..\..\src\wren_vm.c">
       <Filter>Source Files</Filter>
     </ClCompile>
-    <ClCompile Include="..\..\..\src\wren_math.c">
-      <Filter>Source Files</Filter>
-    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="..\..\..\include\wren.h">
@@ -71,8 +68,5 @@
     <ClInclude Include="..\..\..\src\wren_vm.h">
       <Filter>Header Files</Filter>
     </ClInclude>
-    <ClInclude Include="..\..\..\src\wren_math.h">
-      <Filter>Header Files</Filter>
-    </ClInclude>
   </ItemGroup>
 </Project>