abstract interfaces in Classpath source

[John Leuner]

When I compile the classpath java files with jikes, there are many warnings 
like the following:

Issued 1 semantic warning compiling 
"java/security/spec/AlgorithmParameterSpec.java":

    39. public abstract interface AlgorithmParameterSpec
               <------>
*** Warning: Every interface in implicitly abstract. This modifier is obsolete 
and should not be used in new Java programs.

Issued 1 semantic warning compiling "java/security/cert/X509Extension.java":

    64. public abstract interface X509Extension
               <------>
*** Warning: Every interface in implicitly abstract. This modifier is obsolete 
and should not be used in new Java programs.

Issued 1 semantic warning compiling "java/security/spec/KeySpec.java":

    39. public abstract interface KeySpec 
               <------>
*** Warning: Every interface in implicitly abstract. This modifier is obsolete 
and should not be used in new Java programs.


Is there anything that depends on this "abstract" keyword? Can I change these 
files and submit a patch?

John Leuner
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