build: avoid installing static libraries

These are used as part of the internal build of the toolchain and not
distributed, avoid spending the time copying the files.

Author: compnerd

utils/build-windows-toolchain.bat

@@ -472,8 +472,6 @@ cmake ^
 
   -G Ninja ^
   -S %SourceRoot%\Yams || (exit /b)
-cmake --build %BuildRoot%\10 || (exit /b)
-cmake --build %BuildRoot%\10 --target install || (exit /b)
 
 :: Build swift-driver
 cmake ^
@@ -529,8 +527,6 @@ cmake ^
 
   -G Ninja ^
   -S %SourceRoot%\swift-crypto || (exit /b)
-cmake --build %BuildRoot%\12 || (exit /b)
-cmake --build %BuildRoot%\12 --target install || (exit /b)
 
 :: Build swift-collections
 cmake ^
@@ -609,8 +605,6 @@ cmake ^
 
   -G Ninja ^
   -S %SourceRoot%\indexstore-db || (exit /b)
-cmake --build %BuildRoot%\15 || (exit /b)
-cmake --build %BuildRoot%\15 --target install || (exit /b)
 
 :: Build swift-syntax
 cmake ^