Fix false positive when importing input/data in ignored-import (#747)

Fixes #746

Signed-off-by: Anders Eknert <anders@styra.com>

bundle/regal/rules/imports/ignored_import.rego

@@ -12,6 +12,7 @@ import_paths contains path if {
 	path := [p.value | some p in imp.path.value]
 
 	path[0] in {"data", "input"}
+	count(path) > 1
 }
 
 report contains violation if {

bundle/regal/rules/imports/ignored_import_test.rego

@@ -61,3 +61,21 @@ test_success_import_not_ignored if {
 	r := rule.report with input as module
 	r == set()
 }
+
+# this is covered by the avoid-importing-input rule,
+# and `input` is arguably never unused as it's a global variable
+test_success_import_input_not_ignored if {
+	module := ast.policy(`import input`)
+
+	r := rule.report with input as module
+	r == set()
+}
+
+# this is covered by the redundant-data-import rule,
+# and `data` can never be considered unused in Rego
+test_success_import_data_not_ignored if {
+	module := ast.policy(`import data`)
+
+	r := rule.report with input as module
+	r == set()
+}