chore: Remove useless echos in test/ (#1455)

test/help_command.bats

@@ -48,7 +48,6 @@ Details specific for version 1.2.3
 EOF
   )"
   [ "$status" -eq 0 ]
-  echo "$output"
   [ "$output" = "$expected_output" ]
 }
 

test/install_command.bats

@@ -189,7 +189,6 @@ teardown() {
   cd "$PROJECT_DIR"
 
   run asdf install
-  echo "$output"
   [ "$status" -eq 0 ]
 
   [ "$(cat "$ASDF_DIR/installs/dummy/1.0.0/version")" = "1.0.0" ]
@@ -272,15 +271,13 @@ EOM
 @test "install_command keeps the download directory when always_keep_download setting is true" {
   echo 'always_keep_download = yes' >"$HOME/.asdfrc"
   run asdf install dummy 1.1.0
-  echo "$output"
   [ "$status" -eq 0 ]
   [ -d "$ASDF_DIR/downloads/dummy/1.1.0" ]
   [ "$(cat "$ASDF_DIR/installs/dummy/1.1.0/version")" = "1.1.0" ]
 }
 
 @test "install_command fails when download script exits with non-zero code" {
   run asdf install dummy-broken 1.0.0
-  echo "$output"
   [ "$status" -eq 1 ]
   [ ! -d "$ASDF_DIR/downloads/dummy-broken/1.1.0" ]
   [ ! -d "$ASDF_DIR/installs/dummy-broken/1.1.0" ]

test/list_command.bats

@@ -95,14 +95,12 @@ teardown() {
 
 @test "list_all_command fails when list-all script exits with non-zero code" {
   run asdf list-all dummy-broken
-  echo "$output"
   [ "$status" -eq 1 ]
   [[ "$output" == "Plugin dummy-broken's list-all callback script failed with output:"* ]]
 }
 
 @test "list_all_command displays stderr then stdout when failing" {
   run asdf list-all dummy-broken
-  echo "$output"
   [[ "$output" == *"List-all failed!"* ]]
   [[ "$output" == *"Attempting to list versions" ]]
 }

test/shim_exec.bats

@@ -443,7 +443,6 @@ EOM
   run asdf install
 
   run asdf exec dummy world hello
-  echo "$output"
   [ "$output" = "This is Dummy 1.0! hello world" ]
   [ "$status" -eq 0 ]
 }

test/uninstall_command.bats

@@ -100,6 +100,5 @@ EOM
 
   run asdf install dummy 1.0.0
   run asdf uninstall dummy 1.0.0
-  echo "$output"
   [ "$output" = "removed dummy 1.0.0" ]
 }

test/utils.bats

@@ -184,7 +184,6 @@ teardown() {
 
   run find_versions "dummy" "$PROJECT_DIR"
   [ "$status" -eq 0 ]
-  echo "$output"
   [ "$output" = "0.2.0|ASDF_DUMMY_VERSION environment variable" ]
 }