#369 - Polishing.

Remove unused code.

src/main/java/org/springframework/data/r2dbc/query/QueryMapper.java

@@ -736,50 +736,4 @@ public class QueryMapper {
 			return this.property.getTypeInformation();
 		}
 	}
-
-	/**
-	 * Models the ANSI SQL {@code UPPER} function.
-	 * <p>
-	 * Results in a rendered function: {@code UPPER(<expression>)}.
-	 */
-	private class Upper implements Expression {
-		private Literal<Object> delegate;
-
-		/**
-		 * Creates new instance of this class with the given expression. Only expressions of type {@link Column} and
-		 * {@link org.springframework.data.relational.core.sql.BindMarker} are supported.
-		 *
-		 * @param expression expression to be uppercased (must not be {@literal null})
-		 */
-		private Upper(Expression expression) {
-			Assert.notNull(expression, "Expression must not be null!");
-			String functionArgument;
-			if (expression instanceof org.springframework.data.relational.core.sql.BindMarker) {
-				functionArgument = expression instanceof Named ? ((Named) expression).getName().getReference()
-						: expression.toString();
-			} else if (expression instanceof Column) {
-				functionArgument = "";
-				Table table = ((Column) expression).getTable();
-				if (table != null) {
-					functionArgument = toSql(table.getName()) + ".";
-				}
-				functionArgument += toSql(((Column) expression).getName());
-			} else {
-				throw new IllegalArgumentException("Unable to ignore case expression of type " + expression.getClass().getName()
-						+ ". Only " + Column.class.getName() + " and "
-						+ org.springframework.data.relational.core.sql.BindMarker.class.getName() + " types are supported");
-			}
-			this.delegate = SQL.literalOf((Object) ("UPPER(" + functionArgument + ")"));
-		}
-
-		@Override
-		public void visit(Visitor visitor) {
-			delegate.visit(visitor);
-		}
-
-		@Override
-		public String toString() {
-			return delegate.toString();
-		}
-	}
 }