make "see prose" value consistent (drop parens from outliers)

Author: keithamus

css-anchor-position-1/Overview.bs

@@ -2198,7 +2198,7 @@ Initial: normal
 Percentages: n/a
 Inherited: no
 Computed Value: ''position-animation/normal'', or an [=overriding position rectangle=] (see prose)
-Animation type: (see prose)
+Animation type: see prose
 Applies to: [=absolutely positioned boxes=]
 </pre>
 

css-fonts-4/Overview.bs

@@ -7121,7 +7121,7 @@ Applies to: all elements and text
 Inherited: yes
 Percentages: n/a
 Computed value: the keyword ''font-variation-settings/normal'' or a list, each item a string paired with a number
-Animation type: (see prose)
+Animation type: see prose
 </pre>
 
 <wpt>

css-position-4/Overview.bs

@@ -650,7 +650,7 @@ Name: overlay
 Value: none | auto
 Initial: none
 Inherited: no
-Animation Type: (see prose)
+Animation Type: see prose
 </pre>
 
 When an element is [=in the top layer=],