Drop ASL support from tests/lit.cfg

Author: alastairreid

tests/lit.cfg

@@ -10,7 +10,7 @@ backend = os.environ.get("ISA_BACKEND")
 ac_types_dir = os.environ.get("AC_TYPES_DIR")
 sc_types_dir = os.environ.get("SC_TYPES_DIR")
 xdsl_isa_dir = os.environ.get("XDSL_ISA_DIR")
-isa_CC = os.environ.get("ISA_CC", os.environ.get("ASL_CC"))
+isa_CC = os.environ.get("ISA_CC")
 
 # Lit configuration
 if backend is None:
@@ -23,7 +23,7 @@ if backend == "sc" and isa_CC is None:
     isa_CC = "g++"
 
 config.test_format = lit.formats.ShTest("0")
-config.suffixes = {".asl", ".isa"}
+config.suffixes = {".isa"}
 config.target_triple = ""
 
 config.available_features = [backend]