Remove 'num' from README.md.erb

Author: shubhamjain

README.md.erb

@@ -107,7 +107,6 @@ params = {
   hl: "Google UI Language",
   gl: "Google Country",
   safe: "Safe Search Flag",
-  num: "Number of Results",
   start: "Pagination Offset",
   tbm: "nws|isch|shop",
   tbs: "custom to be client criteria",