If you are looking for table index deletion, please refer to this article, Steps to Delete Table Index in SAP.
Step 1: First of all before you get started, execute transaction code SE06 and set your system to modifiable.
Step 2: Execute transaction code SE11. Enter the Database table name and press change.
Step 3: A message will pop up that asking for the developer key. You need to register in SAP service marketplace and obtain they developer key.
Step 4: Once the registration is completed. Click on the Indexes. Then, click Create (Paper Icon – Choose Create Index). Fill in Index Name.
Step 5: You’ll need to fill in the description, define the fields for the indexing. Finally, save and activate!
Step 6: Go to transaction code SE14. Fill in the table and click on Activate & Adjust Database.
Step 7: Update the system statistics and you are done!
