Drop timestamp in generate_bram_types_sim.py

I'm working on build reproducibility of Fedora packages, and this patch fixes
an issue observed in test rebuilds: the timestamp was set to the actual time
of the build, making builds nonreproducible.

Other "Generated by" strings do not include a timestamp, so drop it here too.

techlibs/quicklogic/qlf_k6n10f/generate_bram_types_sim.py

@@ -1,10 +1,9 @@
 import sys
-from datetime import datetime, timezone
 
 def generate(filename):
 	with open(filename, "w") as f:
 		f.write("// **AUTOGENERATED FILE** **DO NOT EDIT**\n")
-		f.write(f"// Generated by {sys.argv[0]} at {datetime.now(timezone.utc)}\n")
+		f.write(f"// Generated by {sys.argv[0]}\n")
 
 		f.write("`timescale 1ns /10ps\n")
 		for a_width in [1,2,4,9,18,36]: