Remove unused crate proc-macro-error

The `proc-macro-error` crate is unmaintained[1] and is causing `cargo
audit` failures[1]. Since the create is not even used by `rtic`, just
remove it as a dependency.

[1]: https://rustsec.org/advisories/RUSTSEC-2024-0370.html

Author: epontan

Cargo.toml

@@ -21,7 +21,7 @@ name = "rtic"
 
 [dependencies]
 cortex-m = "0.7.0"
-cortex-m-rtic-macros = { path = "macros", version = "1.1.6" }
+cortex-m-rtic-macros = { path = "macros", version = "1.1.7" }
 rtic-monotonic = "1.0.0"
 rtic-core = "1.0.0"
 heapless = "0.7.7"

macros/Cargo.toml

@@ -12,14 +12,13 @@ license = "MIT OR Apache-2.0"
 name = "cortex-m-rtic-macros"
 readme = "../README.md"
 repository = "https://github.com/rtic-rs/cortex-m-rtic"
-version = "1.1.6"
+version = "1.1.7"
 
 [lib]
 proc-macro = true
 
 [dependencies]
 proc-macro2 = "1"
-proc-macro-error = "1"
 quote = "1"
 syn = "1"
 rtic-syntax = "1.0.3"