Remove red spelling issue underlines from images

[sebarton69]

Remove red spelling issue underlines from the following images:

• https://github.com/ACRCode/acr_assist_modules/blob/master/Assist/LI-RADS/Liver_segment_schem_2.png
• https://github.com/ACRCode/acr_assist_modules/blob/master/Assist/LI-RADS/patientathccrisk.JPG
• https://github.com/ACRCode/acr_assist_modules/blob/master/Assist/LI-RADS/targetoid_mass.png
• https://github.com/ACRCode/acr_assist_modules/blob/master/Assist/LI-RADS/tiebreakingrulestreated.PNG
• https://github.com/ACRCode/acr_assist_modules/blob/master/Assist/LI-RADS/Treatment_response_algorithm.png