STYLE: Remove CMake-language block-end command arguments

Ancient versions of CMake required else(), endif(), and similar block
termination commands to have arguments matching the command starting the block.
This is no longer the preferred style.

build/cmake/lib/cmake_uninstall.cmake.in

@@ -1,7 +1,7 @@
  
 if(NOT EXISTS "@CMAKE_BINARY_DIR@/install_manifest.txt")
   message(FATAL_ERROR "Cannot find install manifest: @CMAKE_BINARY_DIR@/install_manifest.txt")
-endif(NOT EXISTS "@CMAKE_BINARY_DIR@/install_manifest.txt")
+endif()
 
 file(READ "@CMAKE_BINARY_DIR@/install_manifest.txt" files)
 string(REGEX REPLACE "\n" ";" files "${files}")
@@ -15,8 +15,8 @@ foreach(file ${files})
       )
     if(NOT "${rm_retval}" STREQUAL 0)
       message(FATAL_ERROR "Problem when removing $ENV{DESTDIR}${file}")
-    endif(NOT "${rm_retval}" STREQUAL 0)
-  else(IS_SYMLINK "$ENV{DESTDIR}${file}" OR EXISTS "$ENV{DESTDIR}${file}")
+    endif()
+  else()
     message(STATUS "File $ENV{DESTDIR}${file} does not exist.")
-  endif(IS_SYMLINK "$ENV{DESTDIR}${file}" OR EXISTS "$ENV{DESTDIR}${file}")
-endforeach(file)
+  endif()
+endforeach()