Remove a spurious lifetime from a parameter a slice-encoding method

Author: ZackPierce

sbe-tool/src/main/java/uk/co/real_logic/sbe/generation/rust/RustGenerator.java

@@ -539,8 +539,8 @@ scratchChain, rustTypeName(node.blockLengthType),
  indent(out, 1).append("}\n");
 
  indent(out).append("#[inline]\n");
- indent(out, 1, "pub fn %s_from_slice(mut self, s: &%s [%s]) -> CodecResult<%s> {\n",
- formatMethodName(node.originalName), DATA_LIFETIME, fieldsType,
+ indent(out, 1, "pub fn %s_from_slice(mut self, s: &[%s]) -> CodecResult<%s> {\n",
+ formatMethodName(node.originalName), fieldsType,
  withLifetime(afterGroupCoderType));
  indent(out, 2, "%s.write_type::<%s>(&%s, %s)?; // block length\n",
  scratchChain, rustTypeName(node.blockLengthType),