i40e: remove variables set but not used

The code that uses variables pe_cntx_size and pe_filt_size
has been removed, so they should be removed as well.

Eliminate the following clang warnings:
drivers/net/ethernet/intel/i40e/i40e_common.c:4139:20:
warning: variable 'pe_filt_size' set but not used.
drivers/net/ethernet/intel/i40e/i40e_common.c:4139:6:
warning: variable 'pe_cntx_size' set but not used.
Reported-by: NAbaci Robot <abaci@linux.alibaba.com>
Signed-off-by: NYang Li <yang.lee@linux.alibaba.com>
Tested-by: NGurucharan G <gurucharanx.g@intel.com>
Signed-off-by: NTony Nguyen <anthony.l.nguyen@intel.com>

drivers/net/ethernet/intel/i40e/i40e_common.c

@@ -4138,7 +4138,6 @@ static i40e_status i40e_validate_filter_settings(struct i40e_hw *hw,
 				struct i40e_filter_control_settings *settings)
 {
 	u32 fcoe_cntx_size, fcoe_filt_size;
-	u32 pe_cntx_size, pe_filt_size;
 	u32 fcoe_fmax;
 	u32 val;
 
@@ -4182,8 +4181,6 @@ static i40e_status i40e_validate_filter_settings(struct i40e_hw *hw,
 	case I40E_HASH_FILTER_SIZE_256K:
 	case I40E_HASH_FILTER_SIZE_512K:
 	case I40E_HASH_FILTER_SIZE_1M:
-		pe_filt_size = I40E_HASH_FILTER_BASE_SIZE;
-		pe_filt_size <<= (u32)settings->pe_filt_num;
 		break;
 	default:
 		return I40E_ERR_PARAM;
@@ -4200,8 +4197,6 @@ static i40e_status i40e_validate_filter_settings(struct i40e_hw *hw,
 	case I40E_DMA_CNTX_SIZE_64K:
 	case I40E_DMA_CNTX_SIZE_128K:
 	case I40E_DMA_CNTX_SIZE_256K:
-		pe_cntx_size = I40E_DMA_CNTX_BASE_SIZE;
-		pe_cntx_size <<= (u32)settings->pe_cntx_num;
 		break;
 	default:
 		return I40E_ERR_PARAM;