Bug 1953974 - Remove an invalid assertion. r=dholbert

In this case the center is positive, min and max are negative, so we
know the center is greater than both.

But we still can't compare the min and max because they're different
units, so it can't be simplified.

Differential Revision: https://phabricator.services.mozilla.com/D241722

UltraBlame original commit: 4907b0c9a735b131b41004b9d07d78b70506fa47

Author: marco-c

servo/components/style/values/generics/calc.rs

@@ -9220,37 +9220,7 @@ o
 None
 =
 >
-{
-debug_assert
-!
-(
-false
-"
-We
-compared
-center
-with
-min
-and
-max
-how
-are
-\
-min
-/
-max
-not
-comparable
-with
-each
-other
-?
-"
-)
-;
 return
-;
-}
 }
 ;
 if

testing/web-platform/tests/css/css-values/clamp-length-serialize.html

@@ -127,9 +127,9 @@
 test_valid_value
 (
 '
-letter
+margin
 -
-spacing
+top
 '
 value
 expected
@@ -138,9 +138,9 @@
 test_valid_value
 (
 '
-letter
+margin
 -
-spacing
+top
 '
 calc
 (
@@ -619,6 +619,40 @@
 test_valid_length
 (
 '
+clamp
+(
+-
+18px
+3vw
+-
+3vw
+)
+'
+'
+clamp
+(
+-
+18px
+3vw
+-
+3vw
+)
+'
+'
+clamp
+(
+-
+18px
+3vw
+-
+3vw
+)
+'
+)
+;
+test_valid_length
+(
+'
 calc
 (
 0px