Remove unnecessary mdocCheck command

Author: steinybot

build.sbt

@@ -21,7 +21,7 @@ addCommandAlias(
     "scalafmtCheckAll",
     "scalastyle",
     "versionPolicyCheck",
-    "mdocCheck",
+    "docs/mdoc --check",
     "evicted",
     "undeclaredCompileDependenciesTest",
     "unusedCompileDependenciesTest",
@@ -30,14 +30,6 @@ addCommandAlias(
   ).mkString(";")
 )
 
-addCommandAlias(
-  "mdocCheck",
-  List(
-    """set docs / mdocExtraArguments += "--check"""",
-    "docs / mdoc"
-  ).mkString("; ")
-)
-
 val isScala213 = settingKey[Boolean]("Checks if the current Scala version is 2.13")
 
 inThisBuild(