C++: Remove cpp/duplicated-lines-in-files which was deprecated over a year ago

Author: jketema

config/identical-files.json

@@ -426,7 +426,6 @@
     "python/ql/src/Lexical/CommentedOutCodeMetricOverview.inc.qhelp"
   ],
   "FLinesOfDuplicatedCodeCommon.inc.qhelp": [
-    "cpp/ql/src/Metrics/Files/FLinesOfDuplicatedCodeCommon.inc.qhelp",
     "java/ql/src/Metrics/Files/FLinesOfDuplicatedCodeCommon.inc.qhelp",
     "javascript/ql/src/Metrics/FLinesOfDuplicatedCodeCommon.inc.qhelp",
     "python/ql/src/Metrics/FLinesOfDuplicatedCodeCommon.inc.qhelp"

cpp/ql/src/Metrics/Files/FLinesOfDuplicatedCode.qhelp

@@ -1,4 +1,4 @@
 ---
 category: breaking
 ---
-* The deprecated queries `cpp/duplicate-block`, `cpp/duplicate-function`, `cpp/duplicate-class`, `cpp/duplicate-file`, `cpp/mostly-duplicate-function`, and `cpp/similar-file` have been removed.
+* The deprecated queries `cpp/duplicate-block`, `cpp/duplicate-function`, `cpp/duplicate-class`, `cpp/duplicate-file`, `cpp/mostly-duplicate-function`,`cpp/similar-file`, `cpp/duplicated-lines-in-files` have been removed.