Merge pull request #301 from input-output-hk/rm_old_command_eras

refactor(consts): remove unused legacy era constants

Author: mkoura

cardano_clusterlib/consts.py

@@ -14,11 +14,6 @@
 
 
 class CommandEras:
-    SHELLEY: tp.Final[str] = "shelley"
-    ALLEGRA: tp.Final[str] = "allegra"
-    MARY: tp.Final[str] = "mary"
-    ALONZO: tp.Final[str] = "alonzo"
-    BABBAGE: tp.Final[str] = "babbage"
     CONWAY: tp.Final[str] = "conway"
     LATEST: tp.Final[str] = "latest"