All: Drop support for jQuery 1.6.x

Affects core, effects, position and widget. Only position has unit tests
that fail with jQuery 1.6 without the workaround.

Drops the 1.6.x copies jQuery of jQuery and removes them from the select
in the testsuites.

Fixes #10723
Closes gh-1422

1 files changed, 0 insertions, 8 deletions

diff --git a/ui/effect.js b/ui/effect.js
index f488ffafd..cc9a91045 100644
--- a/ui/effect.js
+++ b/ui/effect.js
@@ -936,14 +936,6 @@ if ( $.uiBackCompat !== false ) {
 			for ( ; i < length; i++ ) {
 				if ( set[ i ] !== null ) {
 					val = element.data( dataSpace + set[ i ] );
-					// support: jQuery 1.6.2
-					// http://bugs.jquery.com/ticket/9917
-					// jQuery 1.6.2 incorrectly returns undefined for any falsy value.
-					// We can't differentiate between "" and 0 here, so we just assume
-					// empty string since it's likely to be a more common value...
-					if ( val === undefined ) {
-						val = "";
-					}
 					element.css( set[ i ], val );
 				}
 			}