Remove useless dependency

Cargo.lock

@@ -25,12 +25,6 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "23ce669cd6c8588f79e15cf450314f9638f967fc5770ff1c7c1deb0925ea7cfa"
 
-[[package]]
-name = "base64"
-version = "0.13.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "904dfeac50f3cdaba28fc6f57fdcddb75f49ed61346676a78c4ffe55877802fd"
-
 [[package]]
 name = "bitflags"
 version = "1.3.2"
@@ -267,7 +261,6 @@ name = "totp_generator"
 version = "0.1.0"
 dependencies = [
  "base32",
- "base64",
  "clap",
  "totp_rfc6238",
 ]

Cargo.toml

@@ -7,6 +7,5 @@ edition = "2018"
 
 [dependencies]
 totp_rfc6238 = "0.5.0"
-base64 = "0.13.0"
 base32 = "0.4.0"
 clap = { version = "3.1.6", features = ["derive"] }