Remove crossgen exclusions for issue 108255 (#118781)

Issue #108255 was fixed by PR #118594

Author: kg

src/tests/issues.targets

@@ -540,21 +540,6 @@
         <ExcludeList Include="$(XunitTestBinBase)/JIT/superpmi/superpmicollect/*">
             <Issue>Not compatible with crossgen2</Issue>
         </ExcludeList>
-        <ExcludeList Include="$(XunitTestBinBase)/Regressions/coreclr/GitHub_68278/**">
-            <Issue>https://github.com/dotnet/runtime/issues/108255</Issue>
-        </ExcludeList>
-        <ExcludeList Include="$(XunitTestBinBase)/JIT/BBT/Scenario4/Not-Int32/**">
-            <Issue>https://github.com/dotnet/runtime/issues/108255</Issue>
-        </ExcludeList>
-        <ExcludeList Include="$(XunitTestBinBase)/JIT/Regression/JitBlue/Runtime_72845/**">
-            <Issue>https://github.com/dotnet/runtime/issues/108255</Issue>
-        </ExcludeList>
-        <ExcludeList Include="$(XunitTestBinBase)/JIT/Regression/JitBlue/Runtime_87393/**">
-            <Issue>https://github.com/dotnet/runtime/issues/108255</Issue>
-        </ExcludeList>
-        <ExcludeList Include="$(XunitTestBinBase)/baseservices/multidimmarray/rank1array/**">
-            <Issue>https://github.com/dotnet/runtime/issues/108255</Issue>
-        </ExcludeList>
         <ExcludeList Include="$(XunitTestBinBase)/JIT/Methodical/Arrays/misc/arrres_il_r/**">
             <Issue>https://github.com/dotnet/runtime/issues/109311</Issue>
         </ExcludeList>