Remove unnecessary documentation

We have some text quoted directly from BIP341, this text is on the net
if folk wish to read it, we don't need it in the source code.

Author: tcharding

src/util/taproot.rs

@@ -859,15 +859,6 @@ impl LeafVersion {
     ///
     /// - If the last bit of the `version` is odd.
     /// - If the `version` is 0x50 ([`TAPROOT_ANNEX_PREFIX`]).
-    // Text from BIP341:
-    // In order to support some forms of static analysis that rely on
-    // being able to identify script spends without access to the output being
-    // spent, it is recommended to avoid using any leaf versions that would conflict
-    // with a valid first byte of either a valid P2WPKH pubkey or a valid P2WSH script
-    // (that is, both v and v | 1 should be an undefined, invalid or disabled opcode
-    // or an opcode that is not valid as the first opcode).
-    // The values that comply to this rule are the 32 even values between
-    // 0xc0 and 0xfe and also 0x66, 0x7e, 0x80, 0x84, 0x96, 0x98, 0xba, 0xbc, 0xbe
     pub fn from_consensus(version: u8) -> Result<Self, TaprootError> {
         match version {
             TAPROOT_LEAF_TAPSCRIPT => Ok(LeafVersion::TapScript),