Remove heck from plume and plume-models

Cargo.lock

@@ -2928,7 +2928,6 @@ dependencies = [
  "gettext-macros",
  "gettext-utils",
  "guid-create",
- "heck",
  "lettre",
  "lettre_email",
  "multipart",
@@ -3041,7 +3040,6 @@ dependencies = [
  "diesel_migrations",
  "glob",
  "guid-create",
- "heck",
  "itertools 0.8.2",
  "lazy_static",
  "ldap3",

Cargo.toml

@@ -15,7 +15,6 @@ gettext = { git = "https://github.com/Plume-org/gettext/", rev = "294c54d74c699f
 gettext-macros = { git = "https://github.com/Plume-org/gettext-macros/", rev = "a7c605f7edd6bfbfbfe7778026bfefd88d82db10" }
 gettext-utils = { git = "https://github.com/Plume-org/gettext-macros/", rev = "a7c605f7edd6bfbfbfe7778026bfefd88d82db10" }
 guid-create = "0.1"
-heck = "0.3.0"
 lettre = "0.9.2"
 lettre_email = "0.9.2"
 num_cpus = "1.10"

plume-models/Cargo.toml

@@ -10,7 +10,6 @@ ammonia = "2.1.1"
 askama_escape = "0.1"
 bcrypt = "0.5"
 guid-create = "0.1"
-heck = "0.3.0"
 itertools = "0.8.0"
 lazy_static = "1.0"
 ldap3 = "0.7.1"