Revert "Add multiple funny maps april fools day (#3538)"

This reverts commit bfb8a9447c.

map-generator/main.go

@@ -79,11 +79,6 @@ var maps = []struct {
 	{Name: "arctic"},
 	{Name: "sanfrancisco"},
 	{Name: "aegean"},
-	{Name: "milkyway"},
-	{Name: "amazonriverwide"},
-	{Name: "reglaciatedantarctica"},
-	{Name: "theboxplus"},
-	{Name: "worldrotated"},
 	{Name: "big_plains", IsTest: true},
 	{Name: "half_land_half_ocean", IsTest: true},
 	{Name: "ocean_and_land", IsTest: true},