chore: fix some small issues detected by golangci-lint

But not using it as some linters are either plain incorrect (the one
suggesting to not use nil for `c.t.Context()`) or just
debatable (checking for err value is a good practice, but there are
good reasons to opt out in some cases).

console/filter.go

@@ -273,7 +273,6 @@ LIMIT 20`, column, column, column, column, column)
 		}
 	}
 	gc.JSON(http.StatusOK, filterCompleteHandlerOutput{filteredCompletions})
-	return
 }
 
 func (c *Component) filterSavedListHandlerFunc(gc *gin.Context) {