Revert "powerpc: add `cur_cpu_spec` symbol to vmcoreinfo"

This reverts commit 7135b921.

I applied this commit prematurely while there was still discussion
ongoing. Revert it so the final patch can be applied cleanly.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/kexec/core.c

@@ -63,8 +63,6 @@ void arch_crash_save_vmcoreinfo(void)
 #ifndef CONFIG_NUMA
 	VMCOREINFO_SYMBOL(contig_page_data);
 #endif
-	VMCOREINFO_SYMBOL(cur_cpu_spec);
-	VMCOREINFO_OFFSET(cpu_spec, mmu_features);
 #if defined(CONFIG_PPC64) && defined(CONFIG_SPARSEMEM_VMEMMAP)
 	VMCOREINFO_SYMBOL(vmemmap_list);
 	VMCOREINFO_SYMBOL(mmu_vmemmap_psize);