[xpu] delete kernel.precision()==float (#9189)

Author: xiuxin121

lite/core/optimizer/mir/__xpu__static_kernel_pick_pass.h

@@ -94,7 +94,6 @@ class XPUStaticKernelPickPass : public mir::StmtPass {
 
       if (kernel_pick_factors_.IsPrecisionConsidered() &&
           (place.precision == kernel.precision() ||
-           kernel.precision() == PRECISION(kFloat) ||
            kernel.precision() == PRECISION(kAny) ||
            place.precision == PRECISION(kAny))) {
         // score skipped, if kernel is int8, but op is not int8