Revert "link the different doctype in the school module (#8844)"

This reverts commit c320537e4ca682c6139fd5cb40fa0cf61a0cd2bb.
diff --git a/erpnext/schools/doctype/course/course.js b/erpnext/schools/doctype/course/course.js
index c667eca..f84c59f 100644
--- a/erpnext/schools/doctype/course/course.js
+++ b/erpnext/schools/doctype/course/course.js
@@ -1,30 +1,18 @@
 frappe.ui.form.on("Course", "refresh", function(frm) {
 	if(!cur_frm.doc.__islocal) {
 		frm.add_custom_button(__("Program"), function() {
-			frappe.route_options = {
-				"Program Course.course": frm.doc.name
-			}
 			frappe.set_route("List", "Program");
 		});
 		
 		frm.add_custom_button(__("Student Group"), function() {
-			frappe.route_options = {
-				course: frm.doc.name
-			}
 			frappe.set_route("List", "Student Group");
 		});
 		
 		frm.add_custom_button(__("Course Schedule"), function() {
-			frappe.route_options = {
-				course: frm.doc.name
-			}
 			frappe.set_route("List", "Course Schedule");
 		});
 		
 		frm.add_custom_button(__("Assessment Plan"), function() {
-			frappe.route_options = {
-				course: frm.doc.name
-			}
 			frappe.set_route("List", "Assessment Plan");
 		});
 	}
diff --git a/erpnext/schools/doctype/program/program.js b/erpnext/schools/doctype/program/program.js
index 5146a19..cc09d0e 100644
--- a/erpnext/schools/doctype/program/program.js
+++ b/erpnext/schools/doctype/program/program.js
@@ -6,37 +6,22 @@
 frappe.ui.form.on("Program", "refresh", function(frm) {
 	if(!frm.doc.__islocal) {
 		frm.add_custom_button(__("Student Applicant"), function() {
-			frappe.route_options = {
-				program: frm.doc.name
-			}
 			frappe.set_route("List", "Student Applicant");
 		});
 		
 		frm.add_custom_button(__("Program Enrollment"), function() {
-			frappe.route_options = {
-				program: frm.doc.name
-			}
 			frappe.set_route("List", "Program Enrollment");
 		});
 		
 		frm.add_custom_button(__("Student Group"), function() {
-			frappe.route_options = {
-				program: frm.doc.name
-			}
 			frappe.set_route("List", "Student Group");
 		});
 		
 		frm.add_custom_button(__("Fee Structure"), function() {
-			frappe.route_options = {
-				program: frm.doc.name
-			}
 			frappe.set_route("List", "Fee Structure");
 		});
 		
 		frm.add_custom_button(__("Fees"), function() {
-			frappe.route_options = {
-				program: frm.doc.name
-			}
 			frappe.set_route("List", "Fees");
 		});
 	}
diff --git a/erpnext/schools/doctype/student_attendance_tool/student_attendance_tool.js b/erpnext/schools/doctype/student_attendance_tool/student_attendance_tool.js
index 11a79e1..6f8c6cd 100644
--- a/erpnext/schools/doctype/student_attendance_tool/student_attendance_tool.js
+++ b/erpnext/schools/doctype/student_attendance_tool/student_attendance_tool.js
@@ -4,12 +4,6 @@
 
 frappe.ui.form.on('Student Attendance Tool', {
 	refresh: function(frm) {
-		if (frappe.route_options) {
-			frm.set_value("based_on", frappe.route_options.based_on);
-			frm.set_value("student_group", frappe.route_options.student_group);
-			frm.set_value("course_schedule", frappe.route_options.course_schedule);
-			frappe.route_options = null;
-		}
 		frm.disable_save();
 	},
 
diff --git a/erpnext/schools/doctype/student_group/student_group.js b/erpnext/schools/doctype/student_group/student_group.js
index 83fe094..ed94690 100644
--- a/erpnext/schools/doctype/student_group/student_group.js
+++ b/erpnext/schools/doctype/student_group/student_group.js
@@ -13,23 +13,11 @@
 
 	refresh: function(frm) {
 		if (!frm.doc.__islocal) {
-			frm.add_custom_button(__("Attendance"), function() {
-				frappe.route_options = {
-					based_on: "Student Group",
-					student_group: frm.doc.name
-				}
-				frappe.set_route("List", "Student Attendance Tool");
-			});
 			frm.add_custom_button(__("Course Schedule"), function() {
-				frappe.route_options = {
-					student_group: frm.doc.name
-				}
 				frappe.set_route("List", "Course Schedule");
 			});
+
 			frm.add_custom_button(__("Assessment Plan"), function() {
-				frappe.route_options = {
-					student_group: frm.doc.name
-				}
 				frappe.set_route("List", "Assessment Plan");
 			});
 			frm.add_custom_button(__("Update Email Group"), function() {
@@ -42,9 +30,6 @@
 				});
 			});
 			frm.add_custom_button(__("Newsletter"), function() {
-				frappe.route_options = {
-					"Newsletter Email Group.email_group": frm.doc.name
-				}
 				frappe.set_route("List", "Newsletter");
 			});
 		}