Remove source line tracking from MediaList and related DevTools code

Source/devtools/protocol.json

Index: Source/devtools/protocol.json
diff --git a/Source/devtools/protocol.json b/Source/devtools/protocol.json
index e64a1178f32e36de1b3522282ad0b3b4cf07133d..4fa9056c5362f1e828804a9615324de8b4a1a523 100644
--- a/Source/devtools/protocol.json
+++ b/Source/devtools/protocol.json
@@ -2391,7 +2391,6 @@
                     { "name": "text", "type": "string", "description": "Media query text." },
                     { "name": "source", "type": "string", "enum": ["mediaRule", "importRule", "linkedSheet", "inlineSheet"], "description": "Source of the media query: \"mediaRule\" if specified by a @media rule, \"importRule\" if specified by an @import rule, \"linkedSheet\" if specified by a \"media\" attribute in a linked stylesheet's LINK tag, \"inlineSheet\" if specified by a \"media\" attribute in an inline stylesheet's STYLE tag." },
                     { "name": "sourceURL", "type": "string", "optional": true, "description": "URL of the document containing the media query description." },
-                    { "name": "sourceLine", "type": "integer", "optional": true, "description": "Line in the document containing the media query (not defined for the \"linkedSheet\" source)." },
                     { "name": "range", "$ref": "SourceRange", "optional": true, "description": "The associated rule (@media or @import) header range in the enclosing stylesheet (if available)." }
                 ],
                 "description": "CSS media query descriptor."