[DOCS] Remove cardinalities from the class diagram (#1303)

This brings our class diagram closer to what the latest version
of the diagram generator creates.

Author: oliverklee

README.md

@@ -783,28 +783,28 @@ classDiagram
     %% end of the generated part
 
 
-    Anchor --> "1" ParserState: parserState
-    CSSList --> "*" CSSList: contents
-    CSSList --> "*" Charset: contents
-    CSSList --> "*" Comment: comments
-    CSSList --> "*" Import: contents
-    CSSList --> "*" RuleSet: contents
-    CSSNamespace --> "*" Comment: comments
-    Charset --> "*" Comment: comments
-    Charset --> "1" CSSString: charset
-    DeclarationBlock --> "*" Selector: selectors
-    Import --> "*" Comment: comments
-    OutputFormat --> "1" OutputFormat: nextLevelFormat
-    OutputFormat --> "1" OutputFormatter: outputFormatter
-    OutputFormatter --> "1" OutputFormat: outputFormat
-    Parser --> "1" ParserState: parserState
-    ParserState --> "1" Settings: parserSettings
-    Rule --> "*" Comment: comments
-    Rule --> "1" RuleValueList: value
-    RuleSet --> "*" Comment: comments
-    RuleSet --> "*" Rule: rules
-    URL --> "1" CSSString: url
-    ValueList --> "*" Value: components
+    Anchor --> ParserState: parserState
+    CSSList --> CSSList: contents
+    CSSList --> Charset: contents
+    CSSList --> Comment: comments
+    CSSList --> Import: contents
+    CSSList --> RuleSet: contents
+    CSSNamespace --> Comment: comments
+    Charset --> Comment: comments
+    Charset --> CSSString: charset
+    DeclarationBlock --> Selector: selectors
+    Import --> Comment: comments
+    OutputFormat --> OutputFormat: nextLevelFormat
+    OutputFormat --> OutputFormatter: outputFormatter
+    OutputFormatter --> OutputFormat: outputFormat
+    Parser --> ParserState: parserState
+    ParserState --> Settings: parserSettings
+    Rule --> Comment: comments
+    Rule --> RuleValueList: value
+    RuleSet --> Comment: comments
+    RuleSet --> Rule: rules
+    URL --> CSSString: url
+    ValueList --> Value: components
 ```
 
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