remove hack to explicitly look for cc variables and use gcc as fallback

src/CMakeLists.txt

@@ -25,13 +25,6 @@
 
 cmake_minimum_required(VERSION 3.16)
 
-# TODO: test if this is still needed on ony of the generators we care about.
-# Select a default compiler because CMake does not respect the PATH environment variable for some generators,
-# e.g. used by existing compute servers in Basel.
-# See https://stackoverflow.com/a/45934279 and https://issues.fast-downward.org/issue1031 for details.
-find_program(CMAKE_C_COMPILER NAMES $ENV{CC} cc gcc PATHS ENV PATH NO_DEFAULT_PATH)
-find_program(CMAKE_CXX_COMPILER NAMES $ENV{CXX} c++ g++ PATHS ENV PATH NO_DEFAULT_PATH)
-
 # Path containing custom CMake modules
 list(APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake_modules)
 include(FastDownwardMacros)