Remove legacy LOAD_TESTS

Author: Mytherin

extension_config.cmake

@@ -1,18 +1,10 @@
 # This file is included by DuckDB's build system. It specifies which extension to load
 
 ################# HTTPFS
-# Windows MinGW tests for httpfs currently not working
-if (NOT MINGW)
-    set(LOAD_HTTPFS_TESTS "LOAD_TESTS")
-else ()
-    set(LOAD_HTTPFS_TESTS "")
-endif()
-
 duckdb_extension_load(json)
 duckdb_extension_load(parquet)
 
 duckdb_extension_load(httpfs
 	SOURCE_DIR ${CMAKE_CURRENT_LIST_DIR}
 	INCLUDE_DIR ${CMAKE_CURRENT_LIST_DIR}/extension/httpfs/include
-	${LOAD_HTTPFS_TESTS}
 )