Revert "Move resource.Quantity rounding to defaulter"

This reverts commit 5b18b4e515.

pkg/api/v1/defaults.go

@@ -52,21 +52,9 @@ func addDefaultingFuncs(scheme *runtime.Scheme) error {
 		SetDefaults_LimitRangeItem,
 		SetDefaults_ConfigMap,
 		SetDefaults_RBDVolumeSource,
-		SetDefaults_ResourceList,
 	)
 }
 
-func SetDefaults_ResourceList(obj *ResourceList) {
-	for key, val := range *obj {
-		// TODO(#18538): We round up resource values to milli scale to maintain API compatibility.
-		// In the future, we should instead reject values that need rounding.
-		const milliScale = -3
-		val.RoundUp(milliScale)
-
-		(*obj)[ResourceName(key)] = val
-	}
-}
-
 func SetDefaults_PodExecOptions(obj *PodExecOptions) {
 	obj.Stdout = true
 	obj.Stderr = true