GameDB: Remove split json files

The original intention was to make it easier to edit via github,
but it's more of a pain than helpful.

scripts/merge_gamedb.py

@@ -1,20 +0,0 @@
-import json
-import sys
-import os
-
-if __name__ == "__main__":
-    if (len(sys.argv) < 3):
-        print("usage: %s <gamedb dir> <output path>" % sys.argv[0])
-        sys.exit(1)
-
-    games = []
-    for file in os.listdir(sys.argv[1]):
-        with open(os.path.join(sys.argv[1], file), "r") as f:
-            fgames = json.load(f)
-            games.extend(list(fgames))
-
-
-    with open(sys.argv[2], "w") as f:
-        json.dump(games, f, indent=1)
-
-    print("Wrote %s" % sys.argv[2])