Say adiós to an old favorite. After a year of bad business , a popular Tex-Mex chain is calling it quits. On The Border Mexican Grill & Cantina, known for slinging a variety of fajitas and a massive selection of margaritas, announced that it has closed all of its company-owned restaurants. The fan favorite announced the bad news on its website, “After many years of serving our communities, On The Border Mexican Grill & Cantina has closed its company-owned restaurant locations. This was an