remove the md5 dependency from Cargo.toml

this never was used so it shouldn't need to be here.

Cargo.lock

@@ -850,12 +850,6 @@ dependencies = [
  "regex-automata",
 ]
 
-[[package]]
-name = "md5"
-version = "0.7.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "490cc448043f947bae3cbee9c203358d62dbee0db12107a74be5c30ccfd09771"
-
 [[package]]
 name = "memchr"
 version = "2.5.0"
@@ -870,7 +864,6 @@ dependencies = [
  "askama_rocket",
  "hex",
  "log",
- "md5",
  "notify",
  "proc_macros",
  "rocket",

Cargo.toml

@@ -17,7 +17,6 @@ lto = "thin"
 [dependencies]
 hex = "0.4"
 log = "0.4"
-md5 = "0.7"
 
 [dependencies.rocket]
 version = "=0.5.0-rc.3"