Remove the two remaining direct references to `rand` (#47)

cp6_782/Cargo.toml

@@ -21,8 +21,6 @@ ark-bls12-377 = { path = "../bls12_377", default-features = false, features = [
 [dev-dependencies]
 ark-serialize = { git = "https://github.com/arkworks-rs/algebra", default-features = false }
 ark-algebra-test-templates = { git = "https://github.com/arkworks-rs/algebra", default-features = false }
-rand = { version = "0.7", default-features = false }
-rand_xorshift = "0.2"
 
 [features]
 default = []

ed_on_bls12_377/Cargo.toml

@@ -24,8 +24,6 @@ ark-relations = { git = "https://github.com/arkworks-rs/snark", default-features
 ark-serialize = { git = "https://github.com/arkworks-rs/algebra", default-features = false }
 ark-algebra-test-templates = { git = "https://github.com/arkworks-rs/algebra", default-features = false }
 ark-curve-constraint-tests = { path = "../curve-constraint-tests", default-features = false }
-rand = { version = "0.7", default-features = false }
-rand_xorshift = "0.2"
 
 [features]
 default = []