Revert "Add ABI-encoding feature (#247)"

This reverts commit fdcd3f6.

Author: jasonpaulos

encoding/abi/abi.go

@@ -3,15 +3,14 @@ module github.com/algorand/go-algorand-sdk
 go 1.13
 
 require (
-	github.com/algorand/go-algorand v0.0.0-20210929134638-1202d32142af // indirect
 	github.com/algorand/go-codec v1.1.7
 	github.com/algorand/go-codec/codec v1.1.7
 	github.com/cucumber/godog v0.8.1
 	github.com/davecgh/go-spew v1.1.1
 	github.com/google/go-querystring v1.0.0
 	github.com/nsf/jsondiff v0.0.0-20200515183724-f29ed568f4ce
 	github.com/pmezard/go-difflib v1.0.0
-	github.com/stretchr/testify v1.7.0
-	golang.org/x/crypto v0.0.0-20210921155107-089bfa567519
+	github.com/stretchr/testify v1.3.0
+	golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550
 	golang.org/x/tools v0.0.0-20200426102838-f3a5411a4c3b // indirect
 )