The ornamental design for a squarelid for foodcontainer with removable locking tabs, as shown and described.
FIG. 1 is a front view of a square lid for food container with removable locking tabs showing my new design;
FIG. 2 is a back view thereof;
FIG. 3 is a top view thereof;
FIG. 4 is a bottom view thereof;
FIG. 5 is a right view thereof;
FIG. 6 is a left view thereof; and,
FIG. 7 is a top front perspective view thereof.
The features shown in broken lines in the various figures are shown for illustrating environmental structure and forming no part of the claimed design.