Revert "temp switch to bw6-optimization branch on algebra" (#172)

Cargo.toml

@@ -68,10 +68,10 @@ debug-assertions = true
 debug = true
 
 [patch.crates-io]
-ark-ff = { git = "https://github.com/arkworks-rs/algebra/", branch = "bw6-optimization" }
-ark-ec = { git = "https://github.com/arkworks-rs/algebra/", branch = "bw6-optimization" }
-ark-poly = { git = "https://github.com/arkworks-rs/algebra/", branch = "bw6-optimization" }
-ark-serialize = { git = "https://github.com/arkworks-rs/algebra/", branch = "bw6-optimization" }
-ark-algebra-test-templates = { git = "https://github.com/arkworks-rs/algebra/", branch = "bw6-optimization" }
-ark-algebra-bench-templates = { git = "https://github.com/arkworks-rs/algebra/", branch = "bw6-optimization" }
+ark-ff = { git = "https://github.com/arkworks-rs/algebra/" }
+ark-ec = { git = "https://github.com/arkworks-rs/algebra/" }
+ark-poly = { git = "https://github.com/arkworks-rs/algebra/" }
+ark-serialize = { git = "https://github.com/arkworks-rs/algebra/" }
+ark-algebra-test-templates = { git = "https://github.com/arkworks-rs/algebra/" }
+ark-algebra-bench-templates = { git = "https://github.com/arkworks-rs/algebra/" }
 ark-r1cs-std = { git = "https://github.com/arkworks-rs/r1cs-std/" }