whereami: Remove a useless check from CMakeLists.txt.

This is a relict from the old build system, where each external project was in
a Git submodule.

Author: s3rvac

deps/whereami/CMakeLists.txt

@@ -2,9 +2,5 @@ set(WHEREAMI_SOURCES
 	whereami.c
 )
 
-if(NOT TARGET whereami)
-
-	add_library(whereami STATIC ${WHEREAMI_SOURCES})
-	target_include_directories(whereami PUBLIC ${CMAKE_CURRENT_LIST_DIR})
-
-endif()
+add_library(whereami STATIC ${WHEREAMI_SOURCES})
+target_include_directories(whereami PUBLIC ${CMAKE_CURRENT_LIST_DIR})