Remove the SecuritySafeCritical from the ParseTargetFrameworkName.

Remove the SecuritySafeCritical from the ParseTargetFrameworkName.

This attribute was added as part of the initial implementation and is no longer needed in the current version. What this attribute does it allows us to call SecurityCritical methods from our code. However, we no longer have the need to do that. Additionally, having this attribute prevents libraries that are explicity SecurityTransparent from compiling this code in their assembly (SecAnnotate would complain).

[tfs-changeset: 1504639]