Do not enable the nightly feature of embassy-executor.

Author: de-vri-es

Cargo.toml

@@ -28,9 +28,7 @@ required-features = ["executor", "time", "examples"]
 test = true
 
 [dependencies]
-embassy-executor = { version = "0.5.0", features = [
-  "nightly",
-], optional = true }
+embassy-executor = { version = "0.5.0", optional = true }
 embassy-time = { version = "0.3.0", optional = true }
 snafu = { version = "0.7.5", default-features = false }
 
@@ -39,7 +37,6 @@ embassy-executor = { version = "0.5.0", features = [
   "arch-std",
   "executor-thread",
   "integrated-timers",
-  "nightly",
 ] }
 embassy-futures = "0.1.0"
 embassy-time = { version = "0.3.0", features = ["std"] }