Remove useless config option cmd-params

Assignments-overview.md

@@ -70,7 +70,6 @@ tasks:
 	  source: "recodex.cpp"
 	  destination: "recodex"
 	  cmd: "g++"
-	  cmd-params: ""
 	  stdout: "compile01.out"
 	  stderr: "compile01.err"
 	  log: "compile.log"
@@ -82,7 +81,6 @@ tasks:
       source: "recodex"
 	  destination: "/codex/boxes/tmp/recodex"
 	  cmd: "mv"
-	  cmd-params: ""
 	  log: "move.log"
 	- task-id: "eval_test01"
 	  priority: 3
@@ -93,7 +91,6 @@ tasks:
 	  source: "recodex"
 	  destination: ""
 	  cmd: "recodex -v -f 01.in"
-	  cmd-params: ""
 	  stdin: "01.in"
 	  stdout: "01.out"
 	  stderr: "01.err"