Remove wantShardName from ParsedProjection.

Author: krk

src/mongo/db/query/parsed_projection.cpp

@@ -60,7 +60,6 @@ Status ParsedProjection::make(OperationContext* opCtx,
     bool wantGeoNearPoint = false;
     bool wantGeoNearDistance = false;
     bool wantSortKey = false;
-    bool wantShardName = false;
 
     // Until we see a positional or elemMatch operator we're normal.
     ArrayOpType arrayOpType = ARRAY_OP_NORMAL;
@@ -176,8 +175,6 @@ Status ParsedProjection::make(OperationContext* opCtx,
                     wantGeoNearPoint = true;
                 } else if (e2.valuestr() == QueryRequest::metaSortKey) {
                     wantSortKey = true;
-                } else if (e2.valuestr() == QueryRequest::metaShardName) {
-                    wantShardName = true;
                 }
 
                 // Of the $meta projections, only sortKey can be covered.
@@ -274,7 +271,6 @@ Status ParsedProjection::make(OperationContext* opCtx,
     pp->_wantGeoNearPoint = wantGeoNearPoint;
     pp->_wantGeoNearDistance = wantGeoNearDistance;
     pp->_wantSortKey = wantSortKey;
-    pp->_wantShardName = wantShardName;
 
     // If it's possible to compute the projection in a covered fashion, populate _requiredFields
     // so the planner can perform projection analysis.

src/mongo/db/query/parsed_projection.h

@@ -104,10 +104,6 @@ class ParsedProjection {
         return _wantSortKey;
     }
 
-    bool wantShardName() const {
-        return _wantShardName;
-    }
-
     /**
      * Returns true if the element at 'path' is preserved entirely after this projection is applied,
      * and false otherwise. For example, the projection {a: 1} will preserve the element located at
@@ -196,8 +192,6 @@ class ParsedProjection {
     // Whether this projection includes a sortKey meta-projection.
     bool _wantSortKey = false;
 
-    bool _wantShardName = false;
-
     bool _hasDottedFieldPath = false;
 };