Simplified and reduced redundancy in code

- Removed 'if type == "info"' as requested by @kevr

- Checked for valid type against the type dictionary, removing the 
needed to maintain two separate spots for type definitions.

aurweb/routers/rpc.py

@@ -58,10 +58,6 @@ async def rpc(request: Request,
     elif v != 5:
         return {"error": "Invalid version specified."}
 
-    # The PHP implementation sets the type to 'multiinfo' when the type is set to 'info'.
-    if type == "info":
-        type = "multiinfo"
-
     # Defaults for returned data
     returned_data = {}