Revert "Export to_vec_padded when boringssl is the backend"

Revert submission 2319094-bssl_jan2023

Reason for revert: cause broken build

Reverted changes: /q/submissionid:2319094-bssl_jan2023

Change-Id: I3e38a9adfff2cced1a6f5814466db67954464239
diff --git a/patches/bssl_to_vec_padded.diff b/patches/bssl_to_vec_padded.diff
deleted file mode 100644
index 2782d50..0000000
--- a/patches/bssl_to_vec_padded.diff
+++ /dev/null
@@ -1,13 +0,0 @@
-diff --git a/src/bn.rs b/src/bn.rs
-index 1cd00dd..dbd7ae9 100644
---- a/src/bn.rs
-+++ b/src/bn.rs
-@@ -814,7 +814,7 @@ impl BigNumRef {
-     /// assert_eq!(&bn_vec, &[0, 0, 0x45, 0x43]);
-     /// ```
-     #[corresponds(BN_bn2binpad)]
--    #[cfg(ossl110)]
-+    #[cfg(any(boringssl, ossl110))]
-     pub fn to_vec_padded(&self, pad_to: i32) -> Result<Vec<u8>, ErrorStack> {
-         let mut v = Vec::with_capacity(pad_to as usize);
-         unsafe {
diff --git a/src/bn.rs b/src/bn.rs
index dbd7ae9..1cd00dd 100644
--- a/src/bn.rs
+++ b/src/bn.rs
@@ -814,7 +814,7 @@
     /// assert_eq!(&bn_vec, &[0, 0, 0x45, 0x43]);
     /// ```
     #[corresponds(BN_bn2binpad)]
-    #[cfg(any(boringssl, ossl110))]
+    #[cfg(ossl110)]
     pub fn to_vec_padded(&self, pad_to: i32) -> Result<Vec<u8>, ErrorStack> {
         let mut v = Vec::with_capacity(pad_to as usize);
         unsafe {